$TTL  86400
@       IN      SOA         ns1.9. dns-admin.9. (
                            2019063002         ; Serial
                            604800         ; Refresh
                            86400         ; Retry
                            2419200         ; Expire
                            604800 )       ; Negative Cache TTL
192.209.37.      IN      PTR       a.nic.dns-tld.site
194.209.37.      IN      PTR       b.nic.dns-tld.site
9.9.9.      IN      PTR       dns.quad9.net
                 IN      NS      ac1.nstld.com
                 IN      NS      ac2.nstld.com
                 IN      NS      a.nic.dns-tld.site
                 IN      NS      b.nic.dns-tld.site
